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Exploring the Influence of different Precursor Materials on the Catalytic Performance and deactivation Characteristics of Iron-Loaded Biochar Catalysts for Toluene removal

SSRN

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SSrN 2024年

作者： Wang, Jinzheng Ye, Chao Yang, Haofeng Ye, Zefu Zhu, Zhujun Liu, Haolin Jin, Hui Wang, Xinjia Zhang, Jiankai Li, Guoneng Tang, Yuanjun Wang, Qinhui Department of Energy and Environmental System Engineering Zhejiang University of Science and Technology Zhejiang Hangzhou310023 China Shanxi Gemeng US-China Clean Energy R&D Center Co. Ltd Shanxi Taiyuan China State Key Laboratory of Clean Energy Utilization Zhejiang University Zhejiang Hangzhou China

This study aimed to investigate the efficacy of iron-loaded biochar catalysts derived from three different biomass sources (rice husk, corn stover, and camphor leaf) for toluene removal and their resistance to deactivation. Among them, CL material exhibited excellent performance with a maximum H2 selectivity of 73.72%. After 80 min of reaction, the surface of TCL still retained partial pore structure, with a low carbon deposition yield. CL material had the highest oxygen vacancy intensity, the greatest decrease in O/C ratio, and the most intense deoxygenation reaction. CL material consumed the most O elements, effectively promoting the removal of toluene, while inhibiting the generation of carbon deposition. TrH exhibited the most severe carbon deposition, with coke initially present in the form of single-layer fragments, followed by gradual growth, stacking, agglomeration, until forming continuous layers, ultimately covering the surface of biochar. The carbon peaks in the three catalysts were mainly Cγ, among which TrH had the highest content. The carbon deposition trend on TCS showed a relatively gradual increase, with most pore structures completely blocked after 80 minutes of toluene feed. In TCS, the competition for oxygen sources between toluene catalytic reaction and carbon reduction reaction was the most intense. © 2024, The Authors. All rights reserved.

关键词： Toluene

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Super microporous sulfur-doped hard carbon synthesized from a π-stacked Polybenzo[c]thiophene boosting reversible lithium-ion insertion at room temperature

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Carbon 2023年第1期213卷

作者： ramar, Alagar Sakthivel, Mani Wang, Fu-Ming Ho, Kuo-Chuan Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology No. 43 Sec. 4 Keelung Road Taipei106 Taiwan Department of Chemical Engineering National Taiwan University Taipei Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Taiwan Sustainable Energy Center National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan Taiwan

Synthesis of porous carbon materials with controlled textural properties is an all-time challenging process for energy storage applications. Aromatic polymers possess high rigidity due to their π-π stacking arrangement and could serve as robust precursors to produce porous carbon. Herein, super-microporous sulfur-doped hard carbons (SM-SdHCs) were synthesized from a highly ordered aromatic polybenzo[c]thiophene between 600 and 800 °C by using KOH as an activation agent. The degree of carbonization and defects were enhanced as the temperature increased from 600 to 800 °C as confirmed by X-ray diffraction and raman spectroscopy techniques. All the SM-SdHCs exhibit a super-microporosity (2 g−1). Among the three synthesized carbons, the SM-SdHC800 exhibited a high discharge capacity of 760.7 mAh g−1 at 20 mA g−1 and showed excellent cycle stability at 200 mA g−1 for 250 cycles. The reversible lithium-ion insertion of SM-SdHC800 anode is accredited to its high degree of carbonization, defect-rich quality, high interlayer distance, and microporous texture with large pore volume (0.68 cm3 g−1). In addition, the excellent cycle stability at 2 A g−1 for 1000 cycles shows its robustness for high C-rate LIBs. Polybenzo[c]thiophene precursor is a perceptive choice to produce sulfur-doped super-microporous hard carbon with controlled textural properties and could bring dramatic advances in the synthesis of nanostructured carbon materials for energy storage applications. © 2023 Elsevier Ltd

关键词： Sulfur

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Effects of Load Impedances at Third Order Intermodulation Tones

Effects of Load Impedances at Third Order Intermodulation To...

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European (Formerly European Gallium Arsenide and Other Semiconductors Application Symposium - EGASS) Microwave Integrated Circuit Conference (EuMIC)

作者： Eigo Kuwata Yashar Alimohammadi Xuan Liu James Bell Paul Tasker Shintaro Shinjo Johannes Benedikt School of Engineering Cardiff University UK Information Technology R&D Center Mitsubishi Electric Corporation Japan

ISBN: (数字)9782874870606

ISBN: (纸本)9781728170404

This paper reports on new multitone active loadpull measurements at the specific frequencies of third order intermodulation distortions (IMd3). The achieved separation between the effects of fundamental and IMd3 loadpull quantify clearly the potential of incorporating IMd3 load impedances into low distortion high efficiency amplifier design. The results show an increase in drain efficiency (dE) of 11 points and 13dB drop in IMd3 levels by varying the IMd3 impedances only. The results demonstrate the same IMd3 optimum impedances for achieving both maximum dE and linearity yet significantly different from impedances for optimum dE at fundamental frequencies, hence strongly suggesting the separate tuning of IMd3 impedances for improving amplifier's dE and linearity. This is the first investigation of loadpull at specific IMd3 tones covering the entire smith chart at realistic frequency spacing and compression levels.

关键词： Intermodulation distortion Microwave integrated circuits Tuners Linearity Frequency measurement Microwave transistors Transistors

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CAT: LoCalization and IdentificAtion Cascade detection Transformer for Open-World Object detection

arXiv

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arXiv 2023年

作者： Ma, Shuailei Wang, Yuefeng Wei, Ying Fan, Jiaqi Li, Thomas H. Liu, Hongli Lv, Fanbing Northeast University Shenyang China Information Technology R&D Innovation Center of Peking University China School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Shenzhen China Changsha Hisense Intelligent System Research Institute Co Ltd China

Open-world object detection (OWOd), as a more general and challenging goal, requires the model trained from data on known objects to detect both known and unknown objects and incrementally learn to identify these unknown objects. The existing works which employ standard detection framework and fixed pseudo-labelling mechanism (PLM) have the following problems: (ii) The inclusion of detecting unknown objects substantially reduces the model’s ability to detect known ones. (ii) The PLM does not adequately utilize the priori knowledge of inputs. (iii) The fixed selection manner of PLM cannot guarantee that the model is trained in the right direction. We observe that humans subconsciously prefer to focus on all foreground objects and then identify each one in detail, rather than localize and identify a single object simultaneously, for alleviating the confusion. This motivates us to propose a novel solution called CAT: LoCalization and IdentificAtion Cascade detection Transformer which decouples the detection process via the shared decoder in the cascade decoding way. In the meanwhile, we propose the self-adaptive pseudo-labelling mechanism which combines the model-driven with input-driven PLM and self-adaptively generates robust pseudo-labels for unknown objects, significantly improving the ability of CAT to retrieve unknown objects. Experiments on two benchmarks, ***, MS-COCO and PASCAL VOC, show that our model outperforms the state-of-the-art methods. The code is publicly available at https://***/xiaomabufei/CAT. Copyright © 2023, The Authors. All rights reserved.

关键词： Object detection

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Leveraging Artificial Intelligence in Online Educational Platforms to Enhance Continuous Professional development in the Teaching Profession

Leveraging Artificial Intelligence in Online Educational Pla...

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International Conference on Computational and Characterization Techniques in engineering & Sciences (CCTES)

作者： Khujakulov Sherzod Amankulovich Mannabov Javlon Tokhirovich Kadirov Tulkin Bakhridinovich Taylakov Umid Kuvandikovich Christo Ananth T. Ananth Kumar Senior Teacher of the the Samarkand Regional National Center for Training Teachers in New Methods Teacher of the Samarkand Regional National Center for Training Teachers in New Methods (PhD) Samarkand Agroinnovations and Research University Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Avadi Uzbekistan&Adjunct Faculty Samarkand State University Chennai India Computer Science and Engineering IFET College of Engineering Tamilnadu India

ISBN: (数字)9798350364699

ISBN: (纸本)9798350364705

To keep up with the dynamic nature of the modern classroom, teachers must have access to online learning platforms for professional development purposes. This investigation looks at how these platforms can be used to improve teachers' skills, make information sharing easier, and open doors to CPd opportunities. This study examines the relationship between online resources and methods to demonstrate how digital tools have an impact on teacher training and professional development by leveraging AI. It also draws attention to the fact that these platforms are helping with information-methodological support for teachers as well as the ongoing reforms in our nation. Incorporating empirical observations and case studies, the analysis demonstrates how effective online platforms are in fostering a collaborative and innovative environment for professional learning. digital transformation has the potential to radically alter how teachers obtain professional development, and this study emphasizes that fact. This will enable teachers to effectively address the demands of modern classrooms.

关键词： Training digital transformation Information sharing Focusing Collaboration Artificial intelligence

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Structure Characterization and Bioactivities of Protein Hydrolysates of Chia Seed Expeller Processed with different Proteases in Silico and in Vitro

SSRN

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SSrN 2023年

作者： Chen, Jinghui Zhu, Ling Wu, Qiming Chen, Yiling Wu, Gangcheng Zhang, Hui School of Food Science and Technology Jiangnan University National Engineering Research Center for Functional Food Jiangnan University Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Wuxi214122 China Nutrilite Health Institute Shanghai China Botanical R&D Centre Wuxi214115 China

Chia seed (CS) expeller was hydrolyzed by 6 proteases (Alcalase, Neutrase, Protamex, Papain, Flavourzyme, Trypsin) in different hydrolytic patterns to improve bioavailability and explore the structure-enzyme active site relationship. At the meantime, in silico hydrolysis was performed to obtain a series of proteolytic sequences of chia seed protein treated by different enzymes. The hydrolysates of non-animal derived protease were further determined by in vitro experiment in terms of health-promoting activities. It is necessary to remove fiber before protease hydrolysis, and Alcalase and Flavorzyme had a good effect on the degradation of residual fiber of CS meal. due to the diversity of enzyme cleave sites, the structure properties of hydrolysate treated by different proteases exhibited discrepancy. Furthermore, hydrolysates of CS meal presented varying bioactivity (antioxidant, hypoglycemic, hypotensive, hypolipidemic, anti-alcoholic activity). By contrast, Neutrase, Protamex and Papain hydrolysis showed significant impact on the production of multiple active functional factors. The highest percentual of angiotensin I converting enzyme inhibitory and alcohol dehydrogenase activation effect were observed in Neutrase and Flavourzyme hydrolysates, with lowest IC50 of 0.219±0.030 mg/mL and 0.047±0.002 mg/mL, respectively. Ultimately, an activity-oriented protease screening method was obtained. © 2023, The Authors. All rights reserved.

关键词： Hydrolysis

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The Effect of Joints on the Performance of Interlocking Block Pavement

SSRN

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SSrN 2023年

作者： Kim, Inhyun Oh, Myounghak Hong, Seung-Wan Chung, Choong-Ki Department of Civil and Environmental Engineering Seoul National University Seoul08826 Korea Republic of Daewoo Engineering and Construction Co. LTD Overseas Civil Engineering Team Seoul National University Seoul08826 Korea Republic of Maritime ICT R&D Center Korea Institute of Ocean science & Technology Busan49111 Korea Republic of

Joints play an important role in Interlocking block pavement (IBP) performance because it transfers the load between the blocks, improving the pavement's capacity to disperse loads and resist settlement. Previously, laboratory model tests were performed to determine the appropriate joint width to achieve good load transfer efficiency. The suggested width, however, varies according to the studies because the optimal width is significantly affected by the geotechnical properties of the paving materials, which have been often overlooked and not clearly delineated. Therefore, in this study, repeated loading tests were performed on IBP with varying joint width, considering the geotechnical aspects (mineralogy, grain size distribution, relative density) of the joint and bedding sands. A newly designed 2d chamber that allows particle image velocimetry analysis was used to evaluate the resulted deformation in the sublayers. Test results indicate that narrow and dense joints exhibited greater settlement resistance and load dispersion ability owing to the higher shear resistance at the joints, resulting in the settlement at sublayers to spread over a wide area in a shallow depth. © 2023, The Authors. All rights reserved.

关键词： Pavements

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Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder Joint with Minor Elements Addition

Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder...

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Electronics Packaging technology Conference (EPTC)

作者： Joo Young Bae Mi-Song Kim Won Sik Hong Sehoon Yoo Jeong Tak Moon Sang-Bok Park Nam Hyun Kang Korea Electronics Technology Institute Gyeonggi-do Korea Korea Institute of Industrial Technology Incheon Korea Solder Development Team R&D Center MK Electron Co. Ltd. Gyeonggi-do Korea SNF Co. Ltd. Gyeonggi-do Korea Department of Materials Science and Engineering Pusan National University Busan Korea

ISBN: (数字)9798331522001

ISBN: (纸本)9798331522018

Coarse intermetallic compound (IMC) formation can lead to brittleness and generate cracks between the solder and the IMC interface under printed circuit board (PCB) warpage. Microstructure of the solder joint is closely related to its thermo-mechanical properties. Thus, it is essential to control the microstructure of the solder joint. Ball grid array (BGA) packages with 300 μm diameter Sn-3.0Ag-0.5Cu (SAC305) and Sn-2.5Ag-0.8Cu-0.05Ni-1.0Bi (SAC $(-\text{Ni}, \text{Bi}))$ solder balls were soldered with SAC305 solder paste on the PCB coupon. These combinations of homogeneous (SAC305 solder ball and paste) and heterogeneous (SAC(- Ni,Bi) solder ball and SAC305 paste) solder joints were prepared to compare solder joint reliability.

关键词： degradation Transmission line matrix methods Printed circuits Thermomechanical processes Electronic packaging thermal management reliability Microstructure Soldering Stress Thermal degradation

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Statistical Analysis of demonstration Operation for Fuel Cell Vehicle 6

Statistical Analysis of Demonstration Operation for Fuel Cel...

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6th International Conference on Transportation Information and Safety, ICTIS 2021

作者： Zhang, dayu Wang, Zhenpo Liu, Peng Sun, Zhenyu Li, Naiwu Wang, Chongwen Beijing Institute of Technology National Engineering Laboratory for Electric Vehicles Beijing100081 China New Energy R&D Center General Technical Management Dept. Line 3: Weichai Power Co. Ltd. Weifang China School of Computer Science & Technology Beijing Institute of Technology Beijing China

ISBN: (纸本)9781665497138

China has continued to support the development of hydrogen energy and fuel cell vehicle technology through National Science and technology projects, and carried out demonstrations and applications of hydrogen energy and fuel cells continuously. relevant departments have cooperated to carry out a series ofprojects to promote the commercial development offuel cell vehicles in China, enabling our country to achieve leapfrog development in terms of the durability, performance, and costs of fuel cell vehicles, and to promote fuel cell vehicles on a large scale. This article is based on the relevant data collected from the National Monitoring and Management center for New Energy Vehicles, which is China's national big data platform for EVs. Conducting detailed statistics and analysis of the market size and operation conditions offuel cell vehicles nationwide, and select the typical city, compare and analyze the operating characteristics of fuel cell vehicles and pure electric vehicles from multiple angles. Providing a solid data supportfor the large-scale promotion offuel cell vehicles, and promoting the commercial development of fuel cell vehicles in China. © 2021 IEEE.

关键词： Fuel cells

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Flow-through in-situ evaporation membrane enabled self-heated membrane distillation for efficient desalination of hypersaline water

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Chemical engineering Journal 2023年第Part2期452卷

作者： Subrahmanya, T.M. Widakdo, Januar Austria, Hannah Faye M. Hung, Wei-Song Kurkuri, Mahaveer d. Wang, Chih-Feng Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Jain Global Campus Karnataka Bengaluru562112 India R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Water crisis and high salinity water treatment are growing challenges for the world. The recently emerged self-heating or surface heating membrane distillation (Md) can be a promising way to obtain fresh water from saline and other wastewater sources. However, its inherent drawbacks such as intolerance to high feed flow rate, low flux, and loss of heat energy through bulk feed stream, limit its realistic applications. Herein, we successfully demonstrate a novel trilayered flow-through in-situ evaporation membrane (FTIEM) enabled membrane distillation process. The PEI-PdA-SBA-15 is spray coated as a top layer of FTIEM, which functions as hydrating, salt screening and thermally insulating layer, thus, it prevents the loss of heat from the middle joule heating layer (i.e., COOH-MWCNTs-PVA layer, where the water evaporation occurs) to the bulk feed stream, while the bottom PVdF microporous membrane permits only vapor to pass through under an appropriate vacuum pressure. The power required for membrane heating is provided by using a d.C. supply. during Md desalination of sea water, the FTIEMs achieve the lowest specific heating energy of 0.024 KWhL−1. In addition, the FTIEMs upon long –term Md operation using hypersaline water as feed, exhibit excellent stability and performance with maximum flux and salt rejection of 29.25 Lm−2h−1 and 99.99 % respectively. Our findings may encourage the development of FTIEMs for desalination of hypersaline water. © 2022 Elsevier B.V.

关键词： desalination

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